an unfamiliar vertebrate is discovered in a tropical forest. it is observed to spend much of its time in water, has four limbs, eyes, nostrils and a body temperature which varies with that of its surroundings. a) to which classes of vertebrate might this animal belongs. b) what other features would you look for to be reasonably sure which was the correct class.
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a) its a amphibian
b) it has a moist skin and smooth
they are cold-blooded
they fertilize inside water
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